硅酸盐学报2009，Vol.37Issue(7)：1244-1248,5.
减缩剂对水泥基材料水化和孔结构的影响
EFFECT OF SHRINKAGE REDUING ADMIXTURE ON HYDRATION AND PORE STRUCTURE OF CEMENT-BASED MATERIALS
张志宾 1徐玲玲 1唐明述1
作者信息
- 1. 南京工业大学材料科学与工程学院,南京,210009
- 折叠
摘要
Abstract
The effect of shrinkage reducing admixture (SPA) on hydration process and pore structure of cement-based materials was studied. The hydration heat, chemically combined water and Ca(OH)2 content of cement paste and pore structure of mortar were measured by isothermal calorimeter, gravimetric method, X-ray diffraction and mercury intrusion porosimetry. The results indicate that the SPA has a slight retarding effect on hydration of cement, and the hydration of paste with and without the SPA tended to be the same with increasing the curing time. The appearance time of exothermic peak can be delayed, and the peak value as well as the hydration heat of cement can be lowered by adding the SPA. The chemically combined water of the SPA paste is less than that of the controlled sample. A difference of hydration between the controlled paste and the SPA paste is shortened with hydration age. The Ca(OH)2 content of the SPA paste is less than that of the controlled paste at 3 d, but they are similar at 28 d. Furthermore, the pore volume can be reduced and the innocuous pores can be increased by the SPA used. In addition, the resultant formation of the SRA in pore solution of cement-based materials was supposed.关键词
水泥基材料/减缩剂/水化/孔结构Key words
cement-based materials/shrinkage reducing admixture/hydration/pore structure分类
化学工程引用本文复制引用
张志宾,徐玲玲,唐明述..减缩剂对水泥基材料水化和孔结构的影响[J].硅酸盐学报,2009,37(7):1244-1248,5.
